According to the first law of thermodynamics,
a. the energy of a system may increase if there is a
corresponding decrease in energy elsewhere in
the universe.
b. the amount of energy in the universe is constant.
c. chemical reactions do not create or destroy
energy.
d. energy can change from one form to another.
e. all of these are true.
Answer: e
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In the total organic carbon (TOC) test, microorganisms are used to measure the levels of carbon in a water sample.
Answer the following statement true (T) or false (F)
Which method of animal cell infection is used by enveloped viruses, but not non-enveloped viruses?
a. receptor-mediated endocytosis b. membrane-channel injection c. fusion d. diffusion
______ is the presence of small numbers of viruses in circulating blood
Fill in the blank(s) with the appropriate word(s).
Rank the following one-base point mutations (from most likely to least likely) with respect to their likelihood of affecting the structure of the corresponding polypeptide
1. insertion mutation deep within an intron 2. substitution mutation at the third position of an exonic codon 3. substitution mutation at the second position of an exonic codon 4. deletion mutation within the first exon of the gene A) 1, 2, 3, 4 B) 4, 3, 2, 1 C) 2, 1, 4, 3 D) 3, 1, 4, 2